histamine

Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

n. A physiologically active amine, C5H9N3, found in plant and animal tissue and released from mast cells as part of an allergic reaction in humans. It stimulates gastric secretion and causes dilation of capillaries, constriction of bronchial smooth muscle, and decreased blood pressure.

from Wiktionary, Creative Commons Attribution/Share-Alike License

n. An amine, C5H9N3, formed by decarboxylation of histidine, that causes dilatation of capillaries, contraction of smooth muscle, and stimulation of gastric acid secretion; it is released during allergic reactions.

The Vitamin Shoppe announced that Histame from Naturally Vitamins is now available. is a dietary supplement that helps with the discomforts of food intolerance, also known as histamine intolerance, by replenishing the body's enzyme Diamine Oxidase (DAO).

The second time the individual eats the food, these specific IgE molecules interact with each other, and the protein, to cause the release of harmful chemicals (such as histamine) from special mast cells.